spiral

(redirected from spiral down)
Also found in: Dictionary, Thesaurus, Legal, Idioms, Encyclopedia.

spiral

 [spi´ral]
1. winding like the thread of a screw; called also helical.
2. a winding structure; see also coil and helix.
Curschmann's s's coiled fibrils of mucin sometimes found in the sputum of patients with asthma. See also Laënnec's pearls.

spi·ral

(spī'răl),
1. Coiled; winding around a center like a watch spring; winding and ascending like a wire spring.
2. A structure in the shape of a coil.
[Mediev. L. spiralis, fr. G. speira, a coil]

spiral

/spi·ral/ (spi´ral)
1. helical; winding like the thread of a screw.
2. helix; a winding structure.

Curschmann's spirals  coiled mucinous fibrils sometimes found in the sputum in bronchial asthma.

spi·ral

(spī'răl)
1. Coiled; winding around a center like a watch spring; winding and ascending like a wire spring.
2. A structure in the shape of a coil.
[Mediev. L. spiralis, fr. G. speira, a coil]

spi·ral

(spī'răl)
1. Coiled; winding around a center like a watch spring; winding and ascending like a wire spring.
2. Structure in shape of a coil.
[Mediev. L. spiralis, fr. G. speira, a coil]

spiral

1. winding like the thread of a screw.
2. a structure curving around a central point or axis.

Curschmann's s's
spiral organ of Corti
see organ of Corti.
spiral penile deviation
a defect in bulls. See corkscrew penis.
spiral septum
the arterial partition between aorta and pulmonary trunk, formed by the fusion of the truncal, bulbar and aorticopulmonary septa of the great vessels attached to the embryonic heart.
spiral worm
Dispharynx nasuta. See synhimantusspiralis.
References in periodicals archive ?
Flying on instruments and the moving map only, fly over the landing threshold as shown on the map, start your spiral down with the 30-degree bank, and see how fast you're coming down in the current condition.
Witnesses spotted a flap blow off so there was no control of the plane, and it was seen to spiral down.
with ready their A "I've seen a lot of people spiral down with alcohol, but I've never seen that happen with weed.
While receiving vectors in an attempt to locate the VFR-only airport, the pilot stated, "actually the field is directly under me if I could, ah, spiral down.
I tried to pull back but my blades chopped the tail off and once you lose tail rotor control you spiral down.
The North London side, in shock after the departure of manager Tony Cottee on Friday, halted their spiral down the table while denting Southend's hopes of climbing back into a play-off position.